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Frictional Properties
Engine Systems Power Loss
Friction accounts for 40% of total power loss
Over 50% of this loss is due to friction between pistons, pistons rings and cylinder bores
Breakdown of Friction Loses by Engine Components
Surface Friction
Properties
Comparison of Surface Friction Coefficients
NCC Frictional Properties
Most effective property is Low coefficient of friction
Significant reduction of friction between sliding parts
Coefficient of friction 0.08 - 0.12 under non lubricating conditions
Exceptional properties under highload, nonlubricating conditions
Hexagonal BN has self lubricating properties
Lower coefficient of friction lower than chrome 0.28 - 0.48
Comparison of Surface Friction
Coefficients of NCC on Ti Alloys
NCC COATING Reduces COF on
Various Materials
Magnesium, Titanium, Aluminum, and Steel
Reduces COF of Ti from 0.36 - 0.38 to 0.10 - 0.12 under lubrication
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